Try non-O for guardian. If your name show at children’s birthday of certificated. If BoC not issued in Thailand embassy need to certify relationships between you and children
Visa amnesty should be last option for you to stay in country. If you have another visa make sure all active. It is super safe than having amnesty. Because you current visa has regulation to back you up. But Amnesty not
It can be because getting a visa from consular will depending on consular requirements. And this is so sure too “to extend non-O immigration need to see original certificated
It can be depending on your previous visa before amnesty period also letter from the embassy or any other Thailand government department. If you have it then you can.
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